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안대명,이창한,최윤찬,조석호,안갑환,김성수 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4
The paper introduces a domestic pump designed for dissolved air flotation (DAF). In the paper, the difference in performance between the domestic DAF pump and conventional pressure saturator is explained using the characteristics of air bubble released. The size distribution of air bubbles released from DAF pump is measured by image analyzer and particle size analyzer. And the mean diameter of bubbles is 43μm. The results are similar to that of pressure saturator. The air volume concentration in the water of domestic DAF pump and pressure saturator are 40 and 70% of theoretical amounts. In DAF system used domestic DAF pump, the removal efficiency of turbidity is 70%.
황규석,안대명 釜山大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.56 No.-
화학공장의 안전운전을 지원하며 운전의 효율성을 높이기 위하여, 화학공장에서 적용되는 운전 패턴을 분석하여 이를 시스템화하였다. 분류된 운전패턴을 이용하여 주어진 운전 목표에 필요한 적절한 하부목표를 체계적으로 설정하여 운전상황 goal-tree를 자동으로 합성하여 제시하는 조업지원 시스템을 개발하였다. 개발된 goal-tree 자동합성 시스템을 촉매 재생 공정에 적용하여 그 효용성을 검토하였다. This paper introduces the computer aiding system for chemical plant operation. Chemical plant is operated by several formal patterns, which are made up operational guideline or operator's experience. Therefore, these patterns were analyzed with operational goal-tree. Using frame work and AI technique, the goal-tree is expanding automatically in this sytem. It makes operation sequences for given situation. This system was applied to catalyst regeneration process and was evaluated its usefulness. This system will give safe operations to operator.
Operation Conditions for Continuous DAF Process with Domestic DAF Pump
An, Dae Myung,Lee, Chang Han,An, Kab Hwan,Cho, Seok Ho,Kim, Seong-Soo 대한상하수도학회 2004 상하수도학회지 Vol.18 No.2
Dissolved air flotation (DAF) is an effective solid/liquid separation process for low density particles, such as algal flocs, humus materials and clay particles produced from low tubidity water. The fraction of humic substances for natural organic matters (NOMs) are considered problematic in water because it can readily react with chlorine to form harmful by-products (trihalomethanes) and can be exposed to undesirable color, tastes and odors in drinking water. A broad class of NOMs includes fulvic acid, humic acid and humin. This paper will discuss the results from a study that performed with a DAF pump process using synthetic wastewater contained humic substance. Batch jar tests were performed to evaluate coagulant dose and recycle ratio on flotation efficiency.